Alien Breed Obliteration is an update of the original top-down shooter in which the player has to find the exit-lift out of each maze while blasting aliens bent on halting your progress.

Hold the control key to shoot, tap the shift key to change weapons or press the space key to access Intex Terminals whenever one is found. More instructions can be found in a manual which is included in the zip file. It's also possible to save at any point by pressing the escape key.

The game is a little old but nevertheless works well enough on modern PCs, plus a cheat code is posted on the front page together with a nifty level creation tutorial. Definitely one for the collection.